EP2484589A2 - Self-stowing jumpseat for aircraft - Google Patents
Self-stowing jumpseat for aircraft Download PDFInfo
- Publication number
- EP2484589A2 EP2484589A2 EP20120250012 EP12250012A EP2484589A2 EP 2484589 A2 EP2484589 A2 EP 2484589A2 EP 20120250012 EP20120250012 EP 20120250012 EP 12250012 A EP12250012 A EP 12250012A EP 2484589 A2 EP2484589 A2 EP 2484589A2
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- European Patent Office
- Prior art keywords
- seat
- jumpseat
- seat frame
- seat pan
- pan
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- 230000001133 acceleration Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
- B64D11/06—Arrangements of seats, or adaptations or details specially adapted for aircraft seats
- B64D11/0691—Arrangements of seats, or adaptations or details specially adapted for aircraft seats specially adapted for cabin crew
Definitions
- This invention relates generally to aircraft interiors, and in particular to aircraft seating.
- Jumpseats are commonly provided in commercial aircraft to provide seating for flight attendants duffing takeoff, landing, in turbulence, and other times when the safety of the flight attendants requires them to be seated.
- flight attendant seats In order to maximize the seat space available for passengers, it is desirable to have flight attendant seats that are compact and do not impinge on passenger space. Consequently, flight attendant jumpseats are commonly attached to the fore and aft bulkheads, which separate the lavatories from the front aisle, rear aisle, galley, etc.
- the space available at the fore and aft bulkheads necessary to accommodate jumpseats for a full complement of flight attendants is inadequate. Design constraints for commercial aircraft require maximum room for passenger seating. Consequently, it is desirable to minimize the space dedicated to flight attendant jumpseats.
- the present invention comprises a self stowing jumpseat.
- the self-stowing jumpseat comprises a seat frame that is deployed by pulling the seat frame out of a pocket formed in the edge of a bulkhead in a manner similar to the action required to close a pocket door.
- the seat pan is folded down to enable a user to be seated.
- the seat pan is spring-loaded to fold up, so that when the user vacates the seat, the seat pan automatically folds up into the closed configuration.
- an interlock lever attached to the seat pan trips the seat frame locks from their locked to their unlocked positions.
- the seat frame has a retraction mechanism that urges the seat into the pocket. Accordingly, as soon as the seat pan interlock lever releases the seat frame locks, the retraction mechanism causes the now-folded seat frame to move automatically into the stowed position within the bulkhead.
- a jumpseat for use in an aircraft having a bulkhead comprising a wall surface extending into the passenger compartment, the jumpseat comprising: a seat frame comprising a seat back having a back surface and a front surface, the seat back defining a seat back plane, the seat frame further comprising a seat pan having a top surface and a bottom surface, the seat pan being joined to the seat back by a hinged connection, the hinged connection enabling the seat pan to be folded upward from an unfolded configuration in which the seat pan is folded down enabling a user to sit on the seat pan to a folded configuration in which the top surface of the seat pan is adjacent to the front surface of the seat back and a support rail mounted to the bulkhead, the support rail having a longitudinal axis parallel to the wall surface of the bulkhead; said seat frame being movable in a translational direction parallel to the longitudinal axis of the support rail and in a direction substantially parallel to the seat back plane from a stowed position to a deployed position
- the seat frame may be further moveable from the exposed position in the folded configuration, to an exposed position in the unfolded configuration.
- the jumpseat may further comprises a resilient member operatively connected to the seat pan for urging the seat pan from the unfolded configuration to the folded configuration
- the resilient member may comprise a torsion spring.
- the hollow pocket may have a depth dimension the depth dimension of the hollow pocket being greater than the width dimension of the opening.
- the jumpseat may further comprise a resilient member operatively connected between the seat frame and the bulkhead for urging the seat flame from the exposed position to the concealed position.
- the jumpseat may further comprise a latch engaging an outer stop for retaining the seat frame in the exposed position-, and an interlock, the interlock operating to release the latch as the seat pan moves from the unfolded configuration to the folded configuration.
- the interlock may comprise an interlock lever attached to the seat pan for rotation about the hinged connection.
- the jumpseat may further comprise a reset tab operatively attached to the bulkhead, and; a spring-loaded pivot providing a pivoting attachment between the interlock lever and the seat pan, the pivoting attachment having an axis of rotation normal to the axis of rotation of the hinged connection of the seat pan, the reset tab engaging the interlock lever as the seat frame moves into the concealed position to move the interlock lever against the spring-loaded pivot to disengage the interlock lever from the latch.
- the jumpseat may further comprise an inner stop capable of being engaged by the latch for retaining the seat frame in the concealed position.
- a j umpseat for use in an aircraft having a bulkhead, the bulkhead having a wall surface and an edge surface, the edge surface oriented substantially normal to the wall surface, the bulkhead further comprising a hollow pocket concealed behind the wall surface, the hollow pocket having an opening formed in the edge surface, the opening having a width dimension
- the jumpseat comprising: a seat frame comprising a seat back having a back surface and a front surface, the seat back defining a seat back plane, the seat frame further comprising a seat pan having a top surface and a bottom surface, the seat pan being joined to the seat back by a hinged connection having an axis of rotation, the hinged connection enabling the seat pan to be folded upward from an unfolded configuration in which the seat pan is folded down enabling a user to sit on the seat pan to a folded configuration in which the top surface of the seat pan is adjacent the front surface of the seat back said seat frame being movable in the folded configuration in a translational direction substantially parallel
- Fig. 1 is a perspective view of a jumpseat incorporating features of the present invention in the concealed position within the bulkhead pocket;
- Fig. 2 is a perspective view of the jumpseat of Fig. 1 moving from the concealed position to a deployed position;
- Fig. 3 is a perspective view of the jumpseat of Fig. 1 in the deployed and locked position
- Fig. 4 is a perspective view of the jumpseat of Fig. 1 in the deployed and locked position with a seat pan folded down into the open position;
- Fig. 5 is a perspective view of the jumpseat of Fig. 1 with the seat pan folded up into the closed position and the jumpseat moving from the deployed position toward the concealed position;
- Fig. 6 is a perspective view of the jumpseat of Fig. 1 returned to the concealed position
- Fig. 7 is a rear perspective view of the jumpseat of Fig. 1 showing details of the lock mechanism in the concealed, locked position;
- Fig. 8 is a rear perspective view of the illustrative jumpseat with the seat frame locks released;
- Ftg. 9 is a rear perspective view of the illustrative jumpseat in the deployed position
- Fig. 10 is a rear perspective view of the illustrative jumpseat in the deployed position with the locks engaged;
- Fig. 11 is a rear perspective view of the illustrative jumpseat with the seat pan folded down into the open position;
- Fig. 12 is a rear perspective view of illustrative jumpseats showing the interlock lever tripping the seat frame locks from their locked positions to their unlocked positions;
- Fig. 13 is a rear perspective view of the illustrative jumpseat returning to the concealed position
- Fig. 14 is a detailed perspective view of the lower lock mechanism illustrating the resetting of the interlock lever
- Fig. 15 is a detailed perspective view of the lower lock mechanism with the interlock lever reset.
- a jumpseat 10 incorporating features of the present invention is stowed initially within a hollow pocket 12 formed inside bulkhead 14.
- Bulkhead 14 may be a lavatory bulkhead or galley bulkhead as is commonly employed to support conventional flight attendant jumpseats, or may be a much thinner bulkhead such as commonly employed to separate the first class and coach cabins.
- jumpseat 10 is concealed entirely within pocket 12 with the exception of exposed edge 16, which supports latch handle 18.
- jumpseat 10 in order to use jumpseat 10, the crewmember lifts latch handle 18, which releases the seat frame locks (described more fully hereinafter). This enables jumpseat 10 to be withdrawn from hollow pocket 12. The jumpseat is then withdrawn by the crewmember to the position shown in Fig. 3 . As the jumpseat 10 is drawn outward, it translates along a pair of linear support rails comprising upper support rail 20 and lower support rail 22.
- Upper support rail 20 and lower support rail 22 each comprise a solid bar of 2024-T351 aluminum approximately 1.78 x 1.19 inches in cross section each supported by rollers (not shown) spaced approximately 12 inches apart within the bulkhead 14, thus enabling the cantilevered jumpseat 10 to withstand approximately 1,900 Ibs (9G's for a 50 th percentile male) of forward acceleration, 6G's of downward acceleration, and 4G's of lateral acceleration.
- the crewmember releases latch handle 18, which causes the seat frame locks to engage so that the jumpseat 10 remains in the deployed, but still folded configuration. If, at this point, the crewmember wishes for the jumpseat 10 to be stowed (e.g. the crewmember must attend to a passenger), the crewmember can simply lift latch handle 18, which will disengage the seat frame locks, Jumpseat 10 has a retraction mechanism that urges seat into hollow pocket 12. Accordingly, as soon as the seat frame locks are released, the retraction mechanism causes jumpseat 10 to move automatically into the stowed, concealed position within bulkhead 14 as shown in Fig. 6 .
- Figs. 7-14 show a rear view of jumpseat 10 with bulkhead 14 removed for clarity.
- Fig. 7 shows jumpseat 10 in the concealed position within the hollow pocket formed within bulkhead 14.
- Jumpseat 10 comprises a seat frame 26 which supports the back portion 28 and the seat pan 24.
- Seat frame 26 also supports upper seat frame lock 30 and lower seat frame lock 32.
- Upper seat frame lock 30 comprises a housing 34 mounted to seat frame 26 which supports upper lock plunger 36.
- Upper lock plunger 36 slides in a vertical direction through an aperture 38 formed in housing 34.
- a spring or other resilient member 40 urges upper lock plunger 36 upward toward upper support rail 20.
- upper lock plunger 36 engages a step 42 formed in upper support bracket 44, which causes upper lock plunger 36 to retain jumpseat 10 in the concealed position.
- Upper lock plunger 36 terminates at its upper end with a roller 46 or other low-friction surface that enables upper lock plunger 36 to slide against the lower surface 76 of upper support bracket 44.
- Upper lock plunger 36 also includes a lower extension 48 which extends downward to engage the input end 50 of rocker arm 52.
- Lower seat frame lock 32 comprises a second housing 54 mounted to seat frame 26. Housing 54 supports a pin 56 about which rocker arm 52 pivots. Output end 58 of rocker arm 52 is attached to a lower lock plunger 60 which engages a hole, notch or step formed in lower support bracket 74 in a manner similar to the manner in which upper lock plunger 36 engages notch 42 to assist in retaining jumpseat 10 in the concealed position.
- a link 62 may be used to couple the arcuate motion of output end 58 to the linear motion of lower lock plunger 60 to avoid causing the mechanism to bind.
- latch handle 18 As latch handle 18 is pulled upward (and outward), it causes operating rod 64 to rotate bell crank 66 counterclockwise about its pivot 68 (as viewed in Fig. 8 ). This causes distal end 70 of bell crank 66 to press downward on pin 72, which in turn causes upper lock plunger 36 to move downward. This action disengages upper lock plunger 36 from step 42 thereby releasing upper seat frame lock 30. Simultaneously the downward motion of lower extension 48 causes input end 50 of rocker arm 52 to rotate downward. This causes output end 58 of rocker arm 52 to draw lower lock plunger 60 upward against a lower lock spring (not shown), which spring-loads lower lock plunger 60 downward into its engaged position.
- a lower lock spring (not shown), which spring-loads lower lock plunger 60 downward into its engaged position.
- rocker arm 52 disengages lock plunger 60 from the notch in lower support bracket 74 thereby releasing lower seat frame lock 32.
- the simultaneous release of upper seat frame lock 30 and lower seat frame lock 32 releases seat frame 26 so that the crewmember can begin to withdraw jumpseat 10 from hollow pocket 12.
- a retraction mechanism consisting of a spring motor 78 which is operatively attached to lower support bracket 74 by means of a tension member such as a cable 80, which is attached to an upright flange 82 extending from lower support bracket 74.
- upper lock plunger 36 engages an outer surface 84 of upper support bracket 44 and lower lock plunger 60 engages a similar feature in lower support bracket 74 to retain jumpseat 10 in the deployed position as shown in Fig. 3 and Fig. 14 .
- interlock lever 86 strikes the outer tip 98 of reset flange 100, This causes interlock lever 86 to compress interlock lever spring 90 to the compressed position as shown in Fig. 7 .
- interlock 1ever 86 presses against the inclined surface 102 of keeper 88. Because keeper 88 pivots independently about pivot 56 the action of interlock lever 86 pressing against inclined surface 102 causes keeper 88 to swing downward out of the way, thereby permitting interlock lever 86 to return to the fully-reset position as shown in Fig. 7 . Keeper 88 then snaps back into position under the influence of keeper spring 104.
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Seats For Vehicles (AREA)
Abstract
Description
- This invention claims priority of
US Provisional Patent Application 61/439,501 filed on February 4, 2011 - This invention relates generally to aircraft interiors, and in particular to aircraft seating.
- Jumpseats are commonly provided in commercial aircraft to provide seating for flight attendants duffing takeoff, landing, in turbulence, and other times when the safety of the flight attendants requires them to be seated. In order to maximize the seat space available for passengers, it is desirable to have flight attendant seats that are compact and do not impinge on passenger space. Consequently, flight attendant jumpseats are commonly attached to the fore and aft bulkheads, which separate the lavatories from the front aisle, rear aisle, galley, etc. As commercial aircraft increase in size, the space available at the fore and aft bulkheads necessary to accommodate jumpseats for a full complement of flight attendants is inadequate. Design constraints for commercial aircraft require maximum room for passenger seating. Consequently, it is desirable to minimize the space dedicated to flight attendant jumpseats.
- Additionally, current flight attendant jumpseats must be manually stowed by the flight attendant. This manual stowing of the jumpseat is time-consuming and detracts from the tasks the flight attendants are required to perform. Moreover, if the flight attendant fails to stow the seat, or stows the seat incorrectly, there is potential for the seat to obstruct aisle ways, which could prevent occupant egress in an emergency evacuation or cause injury to passengers walking past the seat.
- The present invention comprises a self stowing jumpseat. According to an illustrative embodiment of the invention, the self-stowing jumpseat comprises a seat frame that is deployed by pulling the seat frame out of a pocket formed in the edge of a bulkhead in a manner similar to the action required to close a pocket door. Once the seat frame has been deployed and locked in position, the seat pan is folded down to enable a user to be seated. The seat pan is spring-loaded to fold up, so that when the user vacates the seat, the seat pan automatically folds up into the closed configuration. As it does so, an interlock lever attached to the seat pan trips the seat frame locks from their locked to their unlocked positions. The seat frame has a retraction mechanism that urges the seat into the pocket. Accordingly, as soon as the seat pan interlock lever releases the seat frame locks, the retraction mechanism causes the now-folded seat frame to move automatically into the stowed position within the bulkhead.
- In one aspect of the invention there is provided a jumpseat for use in an aircraft having a bulkhead comprising a wall surface extending into the passenger compartment, the jumpseat comprising: a seat frame comprising a seat back having a back surface and a front surface, the seat back defining a seat back plane, the seat frame further comprising a seat pan having a top surface and a bottom surface, the seat pan being joined to the seat back by a hinged connection, the hinged connection enabling the seat pan to be folded upward from an unfolded configuration in which the seat pan is folded down enabling a user to sit on the seat pan to a folded configuration in which the top surface of the seat pan is adjacent to the front surface of the seat back and a support rail mounted to the bulkhead, the support rail having a longitudinal axis parallel to the wall surface of the bulkhead; said seat frame being movable in a translational direction parallel to the longitudinal axis of the support rail and in a direction substantially parallel to the seat back plane from a stowed position to a deployed position in which the seat frame is cantilevered beyond the wall surface into the passenger compartment.
- The seat frame may be further moveable from the exposed position in the folded configuration, to an exposed position in the unfolded configuration.
- The jumpseat may further comprises a resilient member operatively connected to the seat pan for urging the seat pan from the unfolded configuration to the folded configuration
- The resilient member may comprise a torsion spring.
- The hollow pocket may have a depth dimension the depth dimension of the hollow pocket being greater than the width dimension of the opening.
- The jumpseat may further comprise a resilient member operatively connected between the seat frame and the bulkhead for urging the seat flame from the exposed position to the concealed position.
- The jumpseat may further comprise a latch engaging an outer stop for retaining the seat frame in the exposed position-, and an interlock, the interlock operating to release the latch as the seat pan moves from the unfolded configuration to the folded configuration.
- The interlock may comprise an interlock lever attached to the seat pan for rotation about the hinged connection.
- The jumpseat may further comprise a reset tab operatively attached to the bulkhead, and; a spring-loaded pivot providing a pivoting attachment between the interlock lever and the seat pan, the pivoting attachment having an axis of rotation normal to the axis of rotation of the hinged connection of the seat pan, the reset tab engaging the interlock lever as the seat frame moves into the concealed position to move the interlock lever against the spring-loaded pivot to disengage the interlock lever from the latch.
- The jumpseat may further comprise an inner stop capable of being engaged by the latch for retaining the seat frame in the concealed position.
- In a further, independent aspect of the invention there is provided a j umpseat for use in an aircraft having a bulkhead, the bulkhead having a wall surface and an edge surface, the edge surface oriented substantially normal to the wall surface, the bulkhead further comprising a hollow pocket concealed behind the wall surface, the hollow pocket having an opening formed in the edge surface, the opening having a width dimension, the jumpseat comprising: a seat frame comprising a seat back having a back surface and a front surface, the seat back defining a seat back plane, the seat frame further comprising a seat pan having a top surface and a bottom surface, the seat pan being joined to the seat back by a hinged connection having an axis of rotation, the hinged connection enabling the seat pan to be folded upward from an unfolded configuration in which the seat pan is folded down enabling a user to sit on the seat pan to a folded configuration in which the top surface of the seat pan is adjacent the front surface of the seat back said seat frame being movable in the folded configuration in a translational direction substantially parallel to the seat back plane from a concealed position in which the seat frame is contained within the hollow pocket, to an exposed position in which the seat frame is outside of the pocket and adjacent to the edge surface.
- Any feature in one aspect may be applied to any other aspect, in any appropriate combination. Features from any combination of independent or dependent claims may be combined in further embodiments regardless of the dependency of those claims, and regardless of whether those claims are interdependent.
- The present invention will be better understood from a reading of the following detailed description, taken in conjunction with the accompanying drawing figures in which like references designate like elements and, in which:
-
Fig. 1 is a perspective view of a jumpseat incorporating features of the present invention in the concealed position within the bulkhead pocket; -
Fig. 2 is a perspective view of the jumpseat ofFig. 1 moving from the concealed position to a deployed position; -
Fig. 3 is a perspective view of the jumpseat ofFig. 1 in the deployed and locked position; -
Fig. 4 is a perspective view of the jumpseat ofFig. 1 in the deployed and locked position with a seat pan folded down into the open position; -
Fig. 5 is a perspective view of the jumpseat ofFig. 1 with the seat pan folded up into the closed position and the jumpseat moving from the deployed position toward the concealed position; -
Fig. 6 is a perspective view of the jumpseat ofFig. 1 returned to the concealed position; -
Fig. 7 is a rear perspective view of the jumpseat ofFig. 1 showing details of the lock mechanism in the concealed, locked position; -
Fig. 8 is a rear perspective view of the illustrative jumpseat with the seat frame locks released; - Ftg. 9 is a rear perspective view of the illustrative jumpseat in the deployed position;
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Fig. 10 is a rear perspective view of the illustrative jumpseat in the deployed position with the locks engaged; -
Fig. 11 is a rear perspective view of the illustrative jumpseat with the seat pan folded down into the open position; -
Fig. 12 is a rear perspective view of illustrative jumpseats showing the interlock lever tripping the seat frame locks from their locked positions to their unlocked positions; -
Fig. 13 is a rear perspective view of the illustrative jumpseat returning to the concealed position; -
Fig. 14 is a detailed perspective view of the lower lock mechanism illustrating the resetting of the interlock lever; and -
Fig. 15 is a detailed perspective view of the lower lock mechanism with the interlock lever reset. - The drawing figures are intended to illustrate the general manner of construction and are not necessarily to scale. In the detailed description and in the drawing figures, specific illustrative examples are shown and herein described in detail. It should be understood, however, that the drawing figures and detailed description are not intended to limit the invention to the particular form disclosed, but are merely illustrative and intended to teach one of ordinary skill how to make and/or use the invention claimed herein and for setting forth the best mode for carrying out the invention.
- With reference to
Figs. 1-6 , ajumpseat 10 incorporating features of the present invention is stowed initially within ahollow pocket 12 formed insidebulkhead 14. Bulkhead 14 may be a lavatory bulkhead or galley bulkhead as is commonly employed to support conventional flight attendant jumpseats, or may be a much thinner bulkhead such as commonly employed to separate the first class and coach cabins. As shown inFig. 1 . in the concealed, stowed position,jumpseat 10 is concealed entirely withinpocket 12 with the exception of exposededge 16, which supportslatch handle 18. - With particular reference to
Fig. 2 , in order to usejumpseat 10, the crewmemberlifts latch handle 18, which releases the seat frame locks (described more fully hereinafter). This enablesjumpseat 10 to be withdrawn fromhollow pocket 12. The jumpseat is then withdrawn by the crewmember to the position shown inFig. 3 . As thejumpseat 10 is drawn outward, it translates along a pair of linear support rails comprisingupper support rail 20 andlower support rail 22.Upper support rail 20 andlower support rail 22 each comprise a solid bar of 2024-T351 aluminum approximately 1.78 x 1.19 inches in cross section each supported by rollers (not shown) spaced approximately 12 inches apart within thebulkhead 14, thus enabling thecantilevered jumpseat 10 to withstand approximately 1,900 Ibs (9G's for a 50th percentile male) of forward acceleration, 6G's of downward acceleration, and 4G's of lateral acceleration. - When the
jumpseat 10 reaches the position shown inFig. 3 , the crewmember releaseslatch handle 18, which causes the seat frame locks to engage so that thejumpseat 10 remains in the deployed, but still folded configuration. If, at this point, the crewmember wishes for thejumpseat 10 to be stowed (e.g. the crewmember must attend to a passenger), the crewmember can simply lift latch handle 18, which will disengage the seat frame locks,Jumpseat 10 has a retraction mechanism that urges seat intohollow pocket 12. Accordingly, as soon as the seat frame locks are released, the retraction mechanism causes jumpseat 10 to move automatically into the stowed, concealed position withinbulkhead 14 as shown inFig. 6 . - In order to use
jumpseat 10, once the jumpseat is in the deployed, folded configuration shown in shown inFig. 3 , the crewmember simply foldsseat pan 24 down into the position shown inFig. 4 with theupper surface 25 ofseat pan 24 and thefront surface 17 of seat back 15 exposed to accommodate the crewmember.Seat pan 24 is spring-loaded into the folded configuration. Accordingly, when the crewmember vacates the seat,seat pan 24 automatically folds back into the folded configuration as shown inFig. 5 with theupper surface 25 ofseat pan 24 facing thefront surface 17 of seat back 15. Asseat pan 24 moves toward the closed configuration, a seat pan-mounted interlock lever (described more fully hereinafter) trips the seat frame locks from their locked to their unlocked positions. This allows the retraction mechanism to move jumpseat 10 into the concealed position shown inFig. 6 . - The operation of the seat locks, interlock lever and other mechanisms necessary for the operation of
jumpseat 10 are most easily understood with reference toFigs. 7-14 , which show a rear view ofjumpseat 10 withbulkhead 14 removed for clarity.Fig. 7 shows jumpseat 10 in the concealed position within the hollow pocket formed withinbulkhead 14.Jumpseat 10 comprises aseat frame 26 which supports theback portion 28 and theseat pan 24.Seat frame 26 also supports upperseat frame lock 30 and lowerseat frame lock 32. - Upper
seat frame lock 30 comprises ahousing 34 mounted toseat frame 26 which supportsupper lock plunger 36.Upper lock plunger 36 slides in a vertical direction through anaperture 38 formed inhousing 34. A spring or otherresilient member 40 urgesupper lock plunger 36 upward towardupper support rail 20. In the concealed position as shown inFig. 7 ,upper lock plunger 36 engages astep 42 formed inupper support bracket 44, which causesupper lock plunger 36 to retainjumpseat 10 in the concealed position.Upper lock plunger 36 terminates at its upper end with aroller 46 or other low-friction surface that enablesupper lock plunger 36 to slide against thelower surface 76 ofupper support bracket 44.Upper lock plunger 36 also includes alower extension 48 which extends downward to engage theinput end 50 ofrocker arm 52. - Lower
seat frame lock 32 comprises asecond housing 54 mounted toseat frame 26.Housing 54 supports apin 56 about whichrocker arm 52 pivots.Output end 58 ofrocker arm 52 is attached to alower lock plunger 60 which engages a hole, notch or step formed inlower support bracket 74 in a manner similar to the manner in whichupper lock plunger 36 engagesnotch 42 to assist in retainingjumpseat 10 in the concealed position. Alink 62 may be used to couple the arcuate motion ofoutput end 58 to the linear motion oflower lock plunger 60 to avoid causing the mechanism to bind. - With reference in particular to
Fig. 8 , as latch handle 18 is pulled upward (and outward), it causes operatingrod 64 to rotate bell crank 66 counterclockwise about its pivot 68 (as viewed inFig. 8 ). This causesdistal end 70 of bell crank 66 to press downward onpin 72, which in turn causesupper lock plunger 36 to move downward. This action disengagesupper lock plunger 36 fromstep 42 thereby releasing upperseat frame lock 30. Simultaneously the downward motion oflower extension 48 causesinput end 50 ofrocker arm 52 to rotate downward. This causesoutput end 58 ofrocker arm 52 to drawlower lock plunger 60 upward against a lower lock spring (not shown), which spring-loadslower lock plunger 60 downward into its engaged position. The movement ofrocker arm 52 disengages lockplunger 60 from the notch inlower support bracket 74 thereby releasing lowerseat frame lock 32. The simultaneous release of upperseat frame lock 30 and lowerseat frame lock 32releases seat frame 26 so that the crewmember can begin to withdraw jumpseat 10 fromhollow pocket 12. - With reference in particular to
Fig. 9 , as the crewmember withdraws jumpseat 10 fromhollow pocket 12 to the fully deployed but folded configuration as shown inFigs. 3 and9 , the crewmember's efforts are resisted by a retraction mechanism consisting of aspring motor 78 which is operatively attached tolower support bracket 74 by means of a tension member such as acable 80, which is attached to anupright flange 82 extending fromlower support bracket 74. - With reference in particular to
Fig. 10 , once jumpseat 10 has been withdrawn by the crewmember to the fully extended position, latch handle 18 is released. This allowsspring 40 to returnupper lock plunger 36 to its upwardly extended position as shown inFig. 10 . Simultaneously,lower extension 48 moves upward, which allowsrocker arm 52 to rotate counterclockwise aboutpivot 56 thereby allowing lower lock spring to returnlower lock plunger 62 to its extended position.Spring 40 and lower lock spring are relatively fast-acting as compared withspring motor 78. Accordingly,upper lock plunger 36 andlower lock plunger 60 are returned to their extended positions beforespring motor 78 is able to retractjumpseat 10 intohollow pocket 12. Consequently, asspring motor 78 attempts to retract the seat and intohollow pocket 12,upper lock plunger 36 engages anouter surface 84 ofupper support bracket 44 andlower lock plunger 60 engages a similar feature inlower support bracket 74 to retainjumpseat 10 in the deployed position as shown inFig. 3 andFig. 14 . - With particular reference to
Fig. 11 , withjumpseat 10 now in the deployed and locked position, in order to usejumpseat 10, the crewmember simply foldsseat pan 24 downward to the position shown inFig. 11 . Asseat pan 24 is folded downward,interlock lever 86 slides off the end of thekeeper 88, which allowsinterlock lever spring 90 to rotateinterlock lever 86 counterclockwise aboutpivot 92. This causesinterlock lever 86 to become aligned with roller 94 which is attached to input end 50 ofrocker arm 52. Once the crewmember vacates the seat, a torsional spring (not shown) automatically returnsseat pan 24 to the folded condition. - With particular referenced to
Fig. 12 , withinterlock lever 86 now aligned with roller 94, asseat pan 24 is returned to its folded condition,interlock lever 86 presses downward on roller 94. This causesrocker arm 52 to rotate clockwise. As it does so,rocker arm 52 raiseslower lock plunger 60 and lowersupper lock plunger 36, thereby releasing upperseat frame lock 30 and lowerseat frame lock 32.Spring motor 78 is then able to retractjumpseat 10 intohollow pocket 12. - With particular reference to
Figs. 13-15 , asjumpseat 10 returns to its fully-retracted position, interlocklever 86 strikes theouter tip 98 ofreset flange 100, This causesinterlock lever 86 to compressinterlock lever spring 90 to the compressed position as shown inFig. 7 . Simultaneously, interlock 1ever 86 presses against theinclined surface 102 ofkeeper 88. Becausekeeper 88 pivots independently aboutpivot 56 the action ofinterlock lever 86 pressing againstinclined surface 102 causeskeeper 88 to swing downward out of the way, thereby permittinginterlock lever 86 to return to the fully-reset position as shown inFig. 7 .Keeper 88 then snaps back into position under the influence ofkeeper spring 104. - Although certain illustrative embodiments and methods have been disclosed herein, it will be apparent from the foregoing disclosure to those skilled in the art that variations and modifications of such embodiments and methods may be made without departing from the invention. Accordingly, it is intended that the invention should be limited only to the extent required by the appended claims and the rules and principles of applicable law. Additionally, as used herein, unless otherwise specifically defined, the terms "substantially" or "generally" when used with mathematical concepts or measurements mean within ± 10 degrees of angle or within 10 percent of the measurement, whichever is greater.
Claims (9)
- A jumpseat for use in an aircraft having a bulkhead comprising a wall surface extending into the passenger compartment, the jumpseat comprising;a seat frame comprising a seat back having a back surface and a front surface, the seat back defining a seat back plane, the seat frame further comprising a seat pan having a top surface and a bottom surface, the seat pan being joined to the seat back by a hinged connection, the hinged connection enabling the seat pan to be folded upward from an unfolded configuration in which the seat pan is folded down enabling a user to sit on the seat pan to a folded configuration in which the top surface of the seat pan is adjacent to the front surface of the seat back; anda support rail mounted to the bulkhead, the support rail having a longitudinal axis parallel to the wall surface of the bulkhead;said seat frame being movable in a translational direction parallel to the longitudinal axis of the support rail and in a direction substantially parallel to the seat back plane from a stowed position to a deployed position in which the seat frame is cantilevered beyond the wall surface into the passenger compartment.
- The jumpseat of claim 1, wherein:the bulkhead comprises a hollow pocket concealed behind the wall surface, the hollow pocket having an opening that opens into the passenger compartment;andthe seat frame in the stowed position is disposed within the hollow pocket.
- The jumpseat of claim 1, further comprising:a resilient member operatively connected to the seat pan for urging the seat pan from the unfolded configuration to the folded configuration.
- The jumpseat of claim 1, further comprising:a resilient member disposed between the seat frame and the bulkhead for urging the seat frame from the deployed position to the stowed position.
- The jumpseat of claim 4, further comprising:a latch engaging an outer stop for retaining the seat frame in the exposed position; andan interlock, the interlock operating to release the latch as the seat pan moves from the unfolded configuration to the folded configuration.
- The jumpseat of claim 5, wherein:the interlock comprises a interlock lever attached to the seat pan for rotation about the hinged connection.
- The jumpseat of claim 6, wherein the hinged connection has an axis of rotation and the jumpseat further comprises:a reset tab operatively attached to the bulkhead, and;a spring-loaded pivot providing a pivoting attachment between the interlock lever and the seat pan, the pivoting attachment having an axis of rotation normal to the axis of rotation of the hinged connection of the seat pan, the reset tab engaging the interlock lever as the seat frame moves to the concealed position to move the interlock lever against the spring-loaded pivot to disengage the interlock from the latch.
- The jumpseat of claim 7, further comprising:an inner stop capable of being engaged by the latch for retaining the seat frame in the concealed position.
- The jumpseat of claim 1, wherein:the jumpseat is capable of withstanding at least 9G's of forward acceleration while supporting a 50th percentile male occupant.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161439501P | 2011-02-04 | 2011-02-04 | |
US13/348,207 US8770659B2 (en) | 2011-02-04 | 2012-01-11 | Self-stowing jumpseat for aircraft |
Publications (4)
Publication Number | Publication Date |
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EP2484589A2 true EP2484589A2 (en) | 2012-08-08 |
EP2484589A3 EP2484589A3 (en) | 2015-05-27 |
EP2484589B1 EP2484589B1 (en) | 2016-10-05 |
EP2484589B2 EP2484589B2 (en) | 2022-08-03 |
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EP12250012.7A Active EP2484589B2 (en) | 2011-02-04 | 2012-01-25 | Self-stowing jumpseat for aircraft |
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US (1) | US8770659B2 (en) |
EP (1) | EP2484589B2 (en) |
CA (1) | CA2764787A1 (en) |
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DE102012014619A1 (en) * | 2012-07-24 | 2014-01-30 | Airbus Operations Gmbh | Sliding flight attendant seat |
US9260190B2 (en) | 2012-07-24 | 2016-02-16 | Airbus Operations Gmbh | Sliding flight attendant seat |
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Also Published As
Publication number | Publication date |
---|---|
EP2484589B2 (en) | 2022-08-03 |
EP2484589B1 (en) | 2016-10-05 |
US8770659B2 (en) | 2014-07-08 |
CA2764787A1 (en) | 2012-08-04 |
US20120199695A1 (en) | 2012-08-09 |
EP2484589A3 (en) | 2015-05-27 |
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